CN105236661A - System and method for preparing ultrapure water with zero wastewater discharge - Google Patents
System and method for preparing ultrapure water with zero wastewater discharge Download PDFInfo
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- CN105236661A CN105236661A CN201510779129.1A CN201510779129A CN105236661A CN 105236661 A CN105236661 A CN 105236661A CN 201510779129 A CN201510779129 A CN 201510779129A CN 105236661 A CN105236661 A CN 105236661A
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- 229910021642 ultra pure water Inorganic materials 0.000 title claims abstract description 68
- 239000012498 ultrapure water Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 46
- 239000002351 wastewater Substances 0.000 title claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 261
- 238000003860 storage Methods 0.000 claims abstract description 68
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 47
- 230000008929 regeneration Effects 0.000 claims abstract description 42
- 238000011069 regeneration method Methods 0.000 claims abstract description 42
- 238000010612 desalination reaction Methods 0.000 claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 16
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000010457 zeolite Substances 0.000 claims abstract description 16
- 238000002425 crystallisation Methods 0.000 claims abstract description 13
- 230000008025 crystallization Effects 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 238000001704 evaporation Methods 0.000 claims abstract description 9
- 230000008020 evaporation Effects 0.000 claims abstract description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 81
- 238000012545 processing Methods 0.000 claims description 53
- 238000007781 pre-processing Methods 0.000 claims description 37
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 34
- 239000002253 acid Substances 0.000 claims description 28
- 230000001172 regenerating effect Effects 0.000 claims description 26
- 238000009833 condensation Methods 0.000 claims description 25
- 230000005494 condensation Effects 0.000 claims description 25
- 239000003513 alkali Substances 0.000 claims description 24
- 230000001105 regulatory effect Effects 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 23
- 238000011033 desalting Methods 0.000 claims description 14
- 230000008676 import Effects 0.000 claims description 13
- 150000003839 salts Chemical class 0.000 claims description 13
- 239000002699 waste material Substances 0.000 claims description 12
- 238000002203 pretreatment Methods 0.000 claims description 10
- 239000010453 quartz Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 239000000084 colloidal system Substances 0.000 claims description 7
- 241000894006 Bacteria Species 0.000 claims description 6
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 claims description 6
- 230000001580 bacterial effect Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 150000007523 nucleic acids Chemical group 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract description 9
- 239000010865 sewage Substances 0.000 abstract description 3
- 239000006004 Quartz sand Substances 0.000 abstract 1
- 150000001450 anions Chemical class 0.000 abstract 1
- 150000001768 cations Chemical class 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000009296 electrodeionization Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- -1 electric power Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/427—Treatment of water, waste water, or sewage by ion-exchange using mixed beds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/04—Non-contaminated water, e.g. for industrial water supply for obtaining ultra-pure water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention discloses a system for preparing ultrapure water without wastewater discharge, which comprises a pretreatment subsystem, a desalination subsystem, a fine treatment subsystem and a regenerated wastewater pretreatment subsystem; the pretreatment subsystem comprises a raw water storage tank, a water pump, a softening filter, a pH value adjusting tank, a quartz sand filter, an activated carbon filter, a zeolite filter and a pretreatment water storage tank which are sequentially connected through pipelines, the desalination subsystem comprises a primary reverse osmosis host and a secondary reverse osmosis host, the fine treatment subsystem is a mixed bed system, and the regeneration wastewater pretreatment subsystem comprises a regeneration wastewater neutralization pond and an evaporation crystallization device. The system and the method for preparing the ultrapure water realize zero emission of wastewater in the ultrapure water preparation process; the system for preparing ultrapure water comprises a mixed bed, and a large amount of acid-base wastewater generated in the regeneration of the cation resin and the anion resin in the mixed bed is not discharged into a sewage pipe network as in the conventional treatment mode, but is treated in the system of the invention, and finally ultrapure water is obtained.
Description
Technical field
The present invention relates to a kind of preparation method of pure water, be specifically related to a kind of system and method preparing ultrapure water of production process no effuent discharge.
Background technology
Water is a kind of modal compound, and it is Source of life, is also the indispensable valuable source of modern industry.Along with the development of science and technology, the requirement of many fields to quality is more and more higher, and pure water preparation technology becomes a popular research field.
Pure water is divided into drinking pure and industrial pure water.Industrial pure water is divided into three kinds according to specific conductivity, as shown in table 1 below.
Table 1 industrial pure water classification (25 DEG C)
Ultrapure water is widely used in numerous industrial circles such as electronics, medicine, electric power, chemical industry as the analysis design mothod water of high-quality, production technique water and boiler plant supply water.It not only has direct relation with the quality of product and yield rate, and produces active influence to the development of industry-by-industry, is one of starting material indispensable in production process.
About the preparation method of ultrapure water, the female grade of Zhang Zhi is at " ultrapure water preparation " (modern chemical industry, 2011,04 phase: 79-82) mention in a literary composition and prepare ultrapure water with the technical process process petro-chemical corporation underground water of pre-treatment+two-pass reverse osmosis+electrodeionization EDI+ polishing essence mixed bed.In literary composition using quartz filter and accurate filter as pre-treatment, remove the suspended substance in former water, colloid, colourity, turbidity, organism etc., first-stage reverse osmosis, as pro desalting device, removes most dissolved salts, particle, hardness, activated silica in water; Two-pass reverse osmosis and electrodeionization, as smart desalting plant, remove the dissolved salts of trace in water, hardness and SiO further
2, make the effluent quality of whole system reach the requirement of ultrapure water effluent quality; Electrodeionization EDI and polishing essence mixed bed are as the 3rd cover operation, and main triple guaranteeing role, ensures that effluent quality meets associated gas washing water quality needs.This technological work dependable performance, water production rate are 3 tons/h, stable effluent quality, produce water resistance rate at 0.056 below μ S/cm, meet the standard of industrial extra-pure water, and the regeneration period of polishing essence mixed bed extends greatly, decreases component environment and pollutes.But this technique needs to use EDI device, the initial investment of EDI device is expensive, keep in repair more difficult, a lot of material and accessory all require import, and initial investment is very expensive, be not suitable for medium and small sized enterprises, and EDI is when water power is from MODE of operation, the efficiency of electric energy and desalination is lower.
Such as Chinese patent literature CN104150663A(application number 201410438809.2 again) disclose a kind of ultrapure water production system, comprise preprocessing subsystem, reverse osmosis subsystem, mixed bed subsystem; Described preprocessing subsystem comprises the raw water box, raw water pump, more medium filter, activated charcoal filter, the cartridge filter that are connected successively; Described reverse osmosis subsystem comprises one-level high-pressure pump, RO reverse osmosis system, RO water tank, secondary high-pressure pump, pure water tank, and described RO reverse osmosis system comprises first-stage reverse osmosis main frame, two-pass reverse osmosis main frame; Described mixed bed subsystem comprises pure water pump, mixed bed, ultraviolet sterilizer, accurate filter, and pure water tank is connected with pure water pump, and pure water pump, mixed bed, ultraviolet sterilizer, accurate filter connect successively.
All employ mixed bed in above-mentioned ultrapure water preparation technology, need frequent soda acid to regenerate in mixed bed operational process, produce a large amount of acid-base waste fluid, in above-mentioned document, do not mention the treatment process of acid-base waste fluid; The process of the acidic and alkaline waste water that current mixed bed regeneration produces is discharged into municipal wastewater pipe network after being neutralized, and this processing mode is also the waste of water resources.
In recent years; along with people economize on resources and the improving constantly of environmental protection consciousness; what not only require water quality can meet each field uses water requirement; also will some cause the technical matters of water resource waste and contaminate environment to be improved to preparing in ultrapure water technique, these have all promoted the development of pure water preparation technology.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of system and method preparing ultrapure water of production process no effuent discharge.
The technical scheme realizing the present invention first object is a kind of system preparing ultrapure water of no effuent discharge, comprises preprocessing subsystem, desalination subsystem, precision processing subsystem and regenerative wastewater preprocessing subsystem.
Described preprocessing subsystem comprises the former water storage tank, water pump, softening filter, pH value regulating tank, quartz filter, activated charcoal filter, zeolite filter and the pretreated water storage tank that are connected successively by pipeline.
Desalination subsystem comprises the first high-pressure pump, first-stage reverse osmosis main frame, reverse osmosis water tank, the second high-pressure pump, two-pass reverse osmosis main frame, ultraviolet sterilizer, accurate filter and the de-salted water storage tank that are connected successively by pipeline, and the water-in of the first high-pressure pump is connected with the water outlet of the pretreated water storage tank of preprocessing subsystem.
Precision processing subsystem is mixed-bed system, comprise force (forcing) pump, 2 groups of hybrid ionic exchange columns and ultrapure water storage tank, the water-in of force (forcing) pump is connected by the water outlet of pipeline with the de-salted water storage tank of desalination subsystem, the water outlet of force (forcing) pump and the water-in of mixed bed are by pipeline communication, and the water outlet of mixed bed is connected with ultrapure water storage tank by pipeline.
Regenerative wastewater preprocessing subsystem comprises regenerative wastewater neutralization tank and evaporated crystallization device, described evaporation unit is provided with condensation water collection pipeline and water of condensation storage tank, the water outlet of water of condensation storage tank is connected with the softening filter of preprocessing subsystem with pipeline by water pump, and pipeline is provided with valve; Wherein the regeneration acid solution outlet of the hybrid ionic exchange column of precision processing subsystem passes in regenerative wastewater neutralization tank by pipeline, the outlet of regeneration alkali lye also passes in regenerative wastewater neutralization tank by pipeline, and waste water in pond is delivered in evaporation unit by water pump and pipeline by the water outlet of regenerative wastewater neutralization tank.
The pH value regulating tank of described preprocessing subsystem comprises can body, acid solution tank and alkali liquid tank, and acid solution tank and alkali liquid tank are arranged on the top of can body, and acid solution tank and alkali liquid tank are respectively by pipeline and can body UNICOM, and pipeline is provided with valve; Can body is also provided with pH value detector, and the electrode of pH value detector is immersed in the liquid in pH value regulating tank, the instant pH value reading measurement pot liquid; Store the hydrochloric acid of 20% ~ 30% in acid solution tank, in alkali liquid tank, store the sodium hydroxide solution of 15% ~ 20%.
The shaft of the hybrid ionic exchange column of described precision processing subsystem is provided with the import of regeneration acid solution, the outlet of regeneration acid solution, the import of regeneration alkali lye, the outlet of regeneration alkali lye; The import of regeneration acid solution is connected with hydrochloric acid tank by pipeline, the import of regeneration alkali lye is connected with sodium hydroxide solution storage tank by pipeline, wherein in hydrochloric acid tank, the concentration of hydrochloric acid is 20% ~ 30%, and in sodium hydroxide solution storage tank, the concentration of sodium hydroxide solution is 15% ~ 20%.
The processing load of preprocessing subsystem is 8 ~ 12 times of desalination subsystem processes load, and the processing load of preprocessing subsystem is 8 ~ 12 times of the processing load of precision processing subsystem.
The technical scheme realizing the present invention second object is a kind of method preparing ultrapure water of no effuent discharge, comprises the following steps:
1. treating nature water; Passed in former water storage tank by former water, open water pump, former water, by softening filter, removes scale-forming ion in water, reduces original water hardness; The water flowed out from softening filter enters in pH value regulating tank, pH value detector reads the pH value of water in tank in time, if the pH value of water is greater than 7.0 in tank, in tank, drip hydrochloric acid to pH value reading is 7.0, if the pH value of water is less than 7.0 in tank, in tank, drip sodium hydroxide solution to pH value reading is 7.0, if the pH value of water is 7.0 in tank, does not need to regulate.
The water that pH value is adjusted to 7.0 flows out from pH value regulating tank, successively through quartz filter, activated charcoal filter and zeolite filter, through this three-stage filtration except suspended solid, colloid, the organism of 1 ~ 20 μm in anhydrating, alleviate follow-up reverse osmosis membrane processing load, the water flowed out from zeolite filter is stored in pretreated water storage tank.
2. desalting treatment; Water in pretreated water storage tank is delivered in first-stage reverse osmosis main frame by the first high-pressure pump of desalination subsystem, removes most dissolved salts, particle, hardness and activated silica in water through first-stage reverse osmosis; Water through first-stage reverse osmosis process carries out two-pass reverse osmosis again, removes the dissolved salts of trace in water, hardness and SiO further
2.
Water through two steps ro process is sent in ultraviolet sterilizer, the nucleic acid function of ultraviolet damage organism and make bacterial death; The water that ultraviolet sterilizer flows out enters in accurate filter, and the bacterium in water is removed, and the water flowed out from accurate filter is stored in de-salted water storage tank.
3. precision processing; Water after step 2. desalting treatment is delivered in mixed bed by the force (forcing) pump of precision processing subsystem, and in mixed bed, the degree of depth removes the mineral substance in water, and the specific conductivity of effluent quality reaches the standard of ultrapure water, and the ultrapure water obtained is stored in ultrapure water storage tank.
4. mixed bed regeneration waste liquid process; Be disposed after 100 ~ 150 tons of former water continuously, after anionite-exchange resin in mixed bed and Zeo-karb use hydrochloric acid and sodium hydroxide to regenerate respectively, to regeneration waste liquid pre-treatment, the spent acid and the waste lye that are about to regeneration pass in the regenerative wastewater neutralization tank of regenerative wastewater preprocessing subsystem, heat in neutralization tank He in rear feeding evaporated crystallization device, along with the rising of salt concn in evaporated crystallization device, sodium-chlor is separated out, collect the sodium-chlor of crystallization, be stored in after the water vapor condensation produced in evaporative process in water of condensation storage tank.
After pre-treatment, the water in water of condensation storage tank is sent into and is prepared in the softening filter of the preprocessing subsystem of ultrapure water system, 1. 3. carries out purifying to step obtain ultrapure water according to above-mentioned steps.
Concrete, after pre-treatment, the water in water of condensation storage tank enters in pH value regulating tank from the water that softening filter flows out, and pH value detector reads the pH value of water in tank, and the pH of water in pH value regulating tank is adjusted to 7.0; The water that pH value is adjusted to 7.0 flows out from pH value regulating tank, successively through quartz filter, activated charcoal filter and zeolite filter, through this three-stage filtration except suspended solid, colloid, the organism in anhydrating, the water flowed out from zeolite filter is stored in pretreated water storage tank; Water in pretreated water storage tank is delivered in first-stage reverse osmosis main frame by the first high-pressure pump of desalination subsystem, and the water through first-stage reverse osmosis process carries out two-pass reverse osmosis again; Enter after two steps ro in ultraviolet sterilizer, the nucleic acid function of ultraviolet damage organism and make bacterial death; The water that ultraviolet sterilizer flows out enters in accurate filter, and the bacterium in water is removed, and the water flowed out from accurate filter is stored in de-salted water storage tank; Water after desalting treatment is delivered in mixed bed by the force (forcing) pump of precision processing subsystem, and in mixed bed, the degree of depth removes the mineral substance in water, and mixed bed goes out the standard that electrical conductivity of water reaches ultrapure water.
The processing load of above-mentioned steps 1. treating nature water is 8 ~ 12 times of step 2. desalting treatment load, and the processing load of step 1. treating nature water is 8 ~ 12 times of step 3. precision processing load.
The present invention has positive effect: (1) system and method preparing ultrapure water of the present invention achieves ultrapure water preparation process wastewater zero discharge; The system preparing ultrapure water comprises mixed bed, and a large amount of acidic and alkaline waste waters produced when the positive resin in mixed bed and negative resin regeneration are not be discharged in sewage network as existing processing mode, but are processed in the system of the present invention, and finally obtain ultrapure water.
(2) processing load preparing the preprocessing subsystem of the system of ultrapure water of the present invention is 8 ~ 12 times of the processing load of follow-up desalination subsystem and precision processing subsystem, the water quality entering reverse osmosis unit is improve through pretreated water, alleviate the operating pressure of reverse osmosis membrane, reduce fouling membrane, and larger portative power ensures that native system can process comparatively pure tap water, the reuse water of mixed bed simultaneously, 2 μ s/cm can be reached through pretreated middle electrical conductivity of water, can directly use as domestic water.
Because the preprocessing subsystem before precision processing subsystem and desalination subsystem are to the process of former water, the regeneration period of mixed-bed resin is elongated, and the process water yield reaches 120 tons and just need regenerate the yin and yang resin of mixed bed.
(3) system and method preparing ultrapure water of the present invention does not use expensive device, and treatment facility input cost is lower, and occupation area of equipment is little, is applicable to medium and small sized enterprises' manufacture ultrapure water.
(4) the ultrapure electrical conductivity of water that prepared by the system and method preparing ultrapure water of the present invention is low to moderate 0.02 μ s/cm.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
(system preparing ultrapure water of embodiment 1, no effuent discharge)
See Fig. 1, the system preparing ultrapure water of the no effuent discharge of the present embodiment comprises preprocessing subsystem, desalination subsystem, precision processing subsystem and regenerative wastewater preprocessing subsystem.
Described preprocessing subsystem comprises the former water storage tank, water pump, softening filter, pH value regulating tank, quartz filter, activated charcoal filter, zeolite filter and the pretreated water storage tank that are connected successively by pipeline.
Wherein pH value regulating tank comprises can body, acid solution tank and alkali liquid tank, and acid solution tank and alkali liquid tank are arranged on the top of can body, and acid solution tank and alkali liquid tank are respectively by pipeline and can body UNICOM, and pipeline is provided with valve.Can body is also provided with pH value detector, and the electrode of pH value detector is immersed in the liquid in pH value regulating tank, measures the pH value of pot liquid at any time.Store the hydrochloric acid of 20% ~ 30% in acid solution tank, in alkali liquid tank, store the sodium hydroxide solution of 15% ~ 20%.
Described desalination subsystem comprises the first high-pressure pump, first-stage reverse osmosis main frame, reverse osmosis water tank, the second high-pressure pump, two-pass reverse osmosis main frame, ultraviolet sterilizer, accurate filter and the de-salted water storage tank that are connected successively by pipeline.The water-in of the first high-pressure pump is connected with the water outlet of the pretreated water storage tank of preprocessing subsystem.
Precision processing subsystem is mixed-bed system, comprises force (forcing) pump, hybrid ionic exchange column (abbreviation mixed bed) and ultrapure water storage tank that 2 groups of diameters are 600mm; The water-in of force (forcing) pump is connected by the water outlet of pipeline with the de-salted water storage tank of desalination subsystem, and the water outlet of force (forcing) pump and the water-in of mixed bed are by pipeline communication, and the water outlet of mixed bed is connected with ultrapure water storage tank by pipeline.
The shaft of mixed bed is provided with the import of regeneration acid solution, the outlet of regeneration acid solution, the import of regeneration alkali lye, the outlet of regeneration alkali lye; The import of regeneration acid solution is connected with hydrochloric acid tank by pipeline, and the import of regeneration alkali lye is connected with sodium hydroxide solution storage tank by pipeline, and wherein the concentration of hydrochloric acid is 20% ~ 30%, and the concentration of sodium hydroxide solution is 15% ~ 20%.
Regenerative wastewater preprocessing subsystem comprises regenerative wastewater neutralization tank and evaporated crystallization device, and described evaporation unit is provided with condensation water collection pipeline and water of condensation storage tank.The regeneration acid solution outlet of mixed bed passes in regenerative wastewater neutralization tank by pipeline, the outlet of regeneration alkali lye also passes in regenerative wastewater neutralization tank by pipeline, and the sodium chloride solution of neutralized wastewater and high density is delivered in evaporation unit by water pump and pipeline by the water outlet of regenerative wastewater neutralization tank.Waste water after neutralization heating evaporation in evaporation unit, the water of condensation obtained after the vapor condensation of generation is stored in water of condensation storage tank through condensing water conduit.The water outlet of water of condensation storage tank is connected with the softening filter of preprocessing subsystem with pipeline by water pump, and pipeline is provided with valve.
Appeal no effuent discharge prepare in the system of ultrapure water, the processing load of preprocessing subsystem is 8 ~ 12 times of the processing load of follow-up desalination subsystem and precision processing subsystem; In the present embodiment, the processing load of preprocessing subsystem is 5 tons/h, and the processing load of desalination subsystem and precision processing subsystem is 0.5 ton/h.
(method preparing ultrapure water of embodiment 2, no effuent discharge)
The former water of the present embodiment process is tap water, and specific conductivity is 400 ~ 500 μ s/cm.
The method preparing ultrapure water of the no effuent discharge of the present embodiment uses the system described in embodiment 1, comprises the following steps during process:
1. treating nature water.Passed in former water storage tank by tap water, open water pump, former water, by softening filter, removes the scale-forming ion such as calcium, magnesium in water, reduces original water hardness; The water flowed out from softening filter enters in pH value regulating tank, pH value detector reads the pH value of water in tank in time, if the pH value of water is greater than 7.0 in tank, in tank, drip hydrochloric acid to pH value reading is 7.0, if the pH value of water is less than 7.0 in tank, in tank, drip sodium hydroxide solution to pH value reading is 7.0, if the pH value of water is 7.0 in tank, does not need to regulate.
The water that pH value is adjusted to 7.0 flows out from pH value regulating tank, successively through quartz filter, activated charcoal filter and zeolite filter, through this three-stage filtration except the suspended solid, colloid, organism etc. of 1 ~ 20 μm in anhydrating, alleviate follow-up reverse osmosis membrane processing load.The water flowed out from zeolite filter is stored in pretreated water storage tank, and the middle electrical conductivity of water 1. processed through step is 2 μ s/cm.
Processing load during treating nature water is 5 tons/h.
2. desalting treatment.Water in pretreated water storage tank is delivered in first-stage reverse osmosis main frame by the first high-pressure pump of desalination subsystem, removes most dissolved salts, particle, hardness and activated silica in water through first-stage reverse osmosis; Water through first-stage reverse osmosis process carries out two-pass reverse osmosis again, removes the dissolved salts of trace in water, hardness and SiO further
2.
Pretreated water enters in ultraviolet sterilizer after two steps ro, the nucleic acid function of ultraviolet damage organism and make bacterial death; The water that ultraviolet sterilizer flows out enters in accurate filter, and the bacterium in water is removed, and the water flowed out from accurate filter is stored in de-salted water storage tank.
Step processing load is 2. 0.5 ton/h.
Electrical conductivity of water through step 2. desalting treatment is 0.2 ~ 0.3 μ s/cm.
3. precision processing.Water after step 2. desalting treatment is delivered in mixed bed by the force (forcing) pump of precision processing subsystem, in mixed bed, the degree of depth removes the mineral substance in water, the specific conductivity of effluent quality is made to reach 0.02 μ s/cm, reach the standard (0.055 ~ 0.1 μ s/cm) of ultrapure water, the ultrapure water obtained is stored in ultrapure water storage tank stand-by or for sale.
Step processing load is 3. 0.5 ton/h, and the processing load of a complete set of equipment is 0.5 ton/h.
4. mixed bed regeneration waste liquid process.It is 120 that the present embodiment is disposed in 100 ~ 150(the present embodiment continuously) after the former water of ton, anionite-exchange resin in mixed bed and Zeo-karb need regeneration, according to existing renovation process, use hydrochloric acid and sodium hydroxide respectively to after two kinds of resin regenerations, first to regenerative wastewater pre-treatment, spent acid and the waste lye of regeneration pass in the regenerative wastewater neutralization tank of regenerative wastewater preprocessing subsystem, heat in neutralization tank He in rear feeding evaporated crystallization device, along with the rising of salt concn in evaporated crystallization device, sodium-chlor is separated out, collect the sodium-chlor of crystallization, be stored in water of condensation storage tank after the water vapor condensation produced in evaporative process, condensation electrical conductivity of water is 800 μ s/cm.
After regenerative wastewater pre-treatment, water in water of condensation storage tank is sent in the softening filter of preprocessing subsystem, 1. 3. carries out purifying to step according to above-mentioned steps.
Concrete, after the water in water of condensation storage tank is sent into and softened in the softening filter of preprocessing subsystem, the water flowed out from softening filter enters in pH value regulating tank, and pH value detector reads the pH value of water in tank, and the pH of water in pH value regulating tank is adjusted to 7.0.
The water that pH value is adjusted to 7.0 flows out from pH value regulating tank, successively through quartz filter, activated charcoal filter and zeolite filter, through this three-stage filtration except the suspended solid, colloid, organism etc. in anhydrating, the water flowed out from zeolite filter is stored in pretreated water storage tank, and now electrical conductivity of water is 150 ~ 200 μ s/cm.
Water in pretreated water storage tank is delivered in first-stage reverse osmosis main frame by the first high-pressure pump of desalination subsystem, removes most dissolved salts, particle, hardness and activated silica in water through first-stage reverse osmosis; Water through first-stage reverse osmosis process carries out two-pass reverse osmosis again, removes the dissolved salts of trace in water, hardness and SiO further
2.
Pretreated water enters in ultraviolet sterilizer after two steps ro, the nucleic acid function of ultraviolet damage organism and make bacterial death; The water that ultraviolet sterilizer flows out enters in accurate filter, and the bacterium in water is removed, and the water flowed out from accurate filter is stored in de-salted water storage tank.
Water after desalting treatment is delivered in mixed bed by the force (forcing) pump of precision processing subsystem, and in mixed bed, the degree of depth removes the mineral substance in water, and mixed bed goes out electrical conductivity of water and reaches 0.03 μ s/cm, reaches the standard (0.055 ~ 0.1 μ s/cm) of ultrapure water equally.
Therefore the system and method preparing ultrapure water of the present invention achieves ultrapure water preparation process wastewater zero discharge; The system preparing ultrapure water comprises mixed bed, and a large amount of acidic and alkaline waste waters produced when the positive resin in mixed bed and negative resin regeneration are not be discharged in sewage network as existing processing mode, but are processed in the system of the present invention, and finally obtain ultrapure water.
Claims (7)
1. the system preparing ultrapure water of no effuent discharge, is characterized in that: comprise preprocessing subsystem, desalination subsystem, precision processing subsystem and regenerative wastewater preprocessing subsystem;
Described preprocessing subsystem comprises the former water storage tank, water pump, softening filter, pH value regulating tank, quartz filter, activated charcoal filter, zeolite filter and the pretreated water storage tank that are connected successively by pipeline;
Desalination subsystem comprises the first high-pressure pump, first-stage reverse osmosis main frame, reverse osmosis water tank, the second high-pressure pump, two-pass reverse osmosis main frame, ultraviolet sterilizer, accurate filter and the de-salted water storage tank that are connected successively by pipeline, and the water-in of the first high-pressure pump is connected with the water outlet of the pretreated water storage tank of preprocessing subsystem;
Precision processing subsystem is mixed-bed system, comprise force (forcing) pump, 2 groups of hybrid ionic exchange columns and ultrapure water storage tank, the water-in of force (forcing) pump is connected by the water outlet of pipeline with the de-salted water storage tank of desalination subsystem, the water outlet of force (forcing) pump and the water-in of mixed bed are by pipeline communication, and the water outlet of mixed bed is connected with ultrapure water storage tank by pipeline;
Regenerative wastewater preprocessing subsystem comprises regenerative wastewater neutralization tank and evaporated crystallization device, described evaporation unit is provided with condensation water collection pipeline and water of condensation storage tank, the water outlet of water of condensation storage tank is connected with the softening filter of preprocessing subsystem with pipeline by water pump, and pipeline is provided with valve; Wherein the regeneration acid solution outlet of the hybrid ionic exchange column of precision processing subsystem passes in regenerative wastewater neutralization tank by pipeline, the outlet of regeneration alkali lye also passes in regenerative wastewater neutralization tank by pipeline, and waste water in pond is delivered in evaporation unit by water pump and pipeline by the water outlet of regenerative wastewater neutralization tank.
2. the system preparing ultrapure water of no effuent discharge according to claim 1, it is characterized in that: the pH value regulating tank of preprocessing subsystem comprises can body, acid solution tank and alkali liquid tank, acid solution tank and alkali liquid tank are arranged on the top of can body, acid solution tank and alkali liquid tank are respectively by pipeline and can body UNICOM, and pipeline is provided with valve; Can body is also provided with pH value detector, and the electrode of pH value detector is immersed in the liquid in pH value regulating tank, the instant pH value reading measurement pot liquid; Store the hydrochloric acid of 20% ~ 30% in acid solution tank, in alkali liquid tank, store the sodium hydroxide solution of 15% ~ 20%.
3. the system preparing ultrapure water of no effuent discharge according to claim 1, is characterized in that: the shaft of the hybrid ionic exchange column of precision processing subsystem is provided with the import of regeneration acid solution, the outlet of regeneration acid solution, the import of regeneration alkali lye, the outlet of regeneration alkali lye; The import of regeneration acid solution is connected with hydrochloric acid tank by pipeline, the import of regeneration alkali lye is connected with sodium hydroxide solution storage tank by pipeline, wherein in hydrochloric acid tank, the concentration of hydrochloric acid is 20% ~ 30%, and in sodium hydroxide solution storage tank, the concentration of sodium hydroxide solution is 15% ~ 20%.
4. according to the system preparing ultrapure water of the no effuent discharge one of claims 1 to 3 Suo Shu, it is characterized in that: the processing load of preprocessing subsystem is 8 ~ 12 times of desalination subsystem processes load, the processing load of preprocessing subsystem is 8 ~ 12 times of the processing load of precision processing subsystem.
5. the system preparing ultrapure water of no effuent discharge as claimed in claim 1 prepares a method for ultrapure water, it is characterized in that comprising the following steps:
1. treating nature water; Passed in former water storage tank by former water, open water pump, former water, by softening filter, removes scale-forming ion in water, reduces original water hardness; The water flowed out from softening filter enters in pH value regulating tank, pH value detector reads the pH value of water in tank in time, if the pH value of water is greater than 7.0 in tank, in tank, drip hydrochloric acid to pH value reading is 7.0, if the pH value of water is less than 7.0 in tank, in tank, drip sodium hydroxide solution to pH value reading is 7.0, if the pH value of water is 7.0 in tank, does not need to regulate;
The water that pH value is adjusted to 7.0 flows out from pH value regulating tank, successively through quartz filter, activated charcoal filter and zeolite filter, through this three-stage filtration except suspended solid, colloid, the organism of 1 ~ 20 μm in anhydrating, alleviate follow-up reverse osmosis membrane processing load, the water flowed out from zeolite filter is stored in pretreated water storage tank;
2. desalting treatment; Water in pretreated water storage tank is delivered in first-stage reverse osmosis main frame by the first high-pressure pump of desalination subsystem, removes most dissolved salts, particle, hardness and activated silica in water through first-stage reverse osmosis; Water through first-stage reverse osmosis process carries out two-pass reverse osmosis again, removes the dissolved salts of trace in water, hardness and SiO further
2;
Water through two steps ro process is sent in ultraviolet sterilizer, the nucleic acid function of ultraviolet damage organism and make bacterial death; The water that ultraviolet sterilizer flows out enters in accurate filter, and the bacterium in water is removed, and the water flowed out from accurate filter is stored in de-salted water storage tank;
3. precision processing; Water after step 2. desalting treatment is delivered in mixed bed by the force (forcing) pump of precision processing subsystem, and in mixed bed, the degree of depth removes the mineral substance in water, and the specific conductivity of effluent quality reaches the standard of ultrapure water, and the ultrapure water obtained is stored in ultrapure water storage tank;
4. mixed bed regeneration waste liquid process; Be disposed after 100 ~ 150 tons of former water continuously, after anionite-exchange resin in mixed bed and Zeo-karb use hydrochloric acid and sodium hydroxide to regenerate respectively, to regeneration waste liquid pre-treatment, spent acid and the waste lye of regeneration pass in the regenerative wastewater neutralization tank of regenerative wastewater preprocessing subsystem, heat in neutralization tank He in rear feeding evaporated crystallization device, along with the rising of salt concn in evaporated crystallization device, sodium-chlor is separated out, collect the sodium-chlor of crystallization, be stored in water of condensation storage tank after the water vapor condensation produced in evaporative process;
After pre-treatment, the water in water of condensation storage tank is sent into and is prepared in the softening filter of the preprocessing subsystem of ultrapure water system, 1. 3. carries out purifying to step obtain ultrapure water according to above-mentioned steps.
6. the system preparing ultrapure water of no effuent discharge according to claim 5 prepares the method for ultrapure water, it is characterized in that: step is 4. after pre-treatment, water in water of condensation storage tank enters in pH value regulating tank from the water that softening filter flows out, pH value detector reads the pH value of water in tank, and the pH of water in pH value regulating tank is adjusted to 7.0; The water that pH value is adjusted to 7.0 flows out from pH value regulating tank, successively through quartz filter, activated charcoal filter and zeolite filter, through this three-stage filtration except suspended solid, colloid, the organism in anhydrating, the water flowed out from zeolite filter is stored in pretreated water storage tank; Water in pretreated water storage tank is delivered in first-stage reverse osmosis main frame by the first high-pressure pump of desalination subsystem, and the water through first-stage reverse osmosis process carries out two-pass reverse osmosis again; Enter after two steps ro in ultraviolet sterilizer, the nucleic acid function of ultraviolet damage organism and make bacterial death; The water that ultraviolet sterilizer flows out enters in accurate filter, and the bacterium in water is removed, and the water flowed out from accurate filter is stored in de-salted water storage tank; Water after desalting treatment is delivered in mixed bed by the force (forcing) pump of precision processing subsystem, and in mixed bed, the degree of depth removes the mineral substance in water, and mixed bed goes out the standard that electrical conductivity of water reaches ultrapure water.
7. the system preparing ultrapure water of no effuent discharge according to claim 5 prepares the method for ultrapure water, it is characterized in that: the processing load for the treatment of nature water is 8 ~ 12 times of desalting treatment load, the processing load for the treatment of nature water is 8 ~ 12 times of precision processing load.
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| CN106219820A (en) * | 2016-08-31 | 2016-12-14 | 江苏宏标科技有限公司 | A kind of for power plant's soft brush treatment desalinating process |
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| CN107804943B (en) | 2021-03-02 |
| CN107804943A (en) | 2018-03-16 |
| CN105236661B (en) | 2017-12-19 |
| CN107673533B (en) | 2020-12-04 |
| CN107673533A (en) | 2018-02-09 |
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Address after: No. 1801 Zhong Wu Avenue, Changzhou, Jiangsu Province, Jiangsu Patentee after: Jiangsu University of Technology Address before: 213001 1801 Zhong Wu Avenue, Zhong Lou District, Changzhou, Jiangsu Patentee before: Jiangsu University of Technology |
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Effective date of registration: 20210125 Address after: 213300 No.9 tianjiashan Industrial Park, Tianmuhu Town, Liyang City, Changzhou City, Jiangsu Province Patentee after: LIYANG LIFANG PRECIOUS METALS MATERIAL Co.,Ltd. Address before: 213001 No. 1801 Wu Cheng Road, Changzhou, Jiangsu Patentee before: JIANGSU University OF TECHNOLOGY |
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Granted publication date: 20171219 Termination date: 20211113 |